Apparatus for electric welding.



1 T. E. MURRAY.

APPARATUS FOR ELECTRIC'WELDING.

APPLICATION FILED APR. 23, 19 15,

Patented Oct. 12, 19-15.

2 SHEETS-SHEET I.

"ii w 6] nvenfoz S 1/13 ewesmsm s T. E. vMURRAY.

APPARATUS FOR ELECTRIC ,WELDING.

APPLICATION FILED APR.23. 1915.

1,156,426. Patented Oct. 12, 1915.

2 SHEETS-SHEET 2.

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I3 Helical springs connected orlr, have i l linger-oven c ding, oi":.iiiicli ecificzition. neinvention relates to elec old is in anapparatus Where of bodies may be W g'etlier in succession by a li cetrolled current of "cred on the accompanying; o s e plan n v 'Wfil is asection on 3 is a. longitudinal sec;

i Q a m -iw 7 are 1 ri-P 1 n 01 too souls carijlllxc mic fillcilnrbiosicontee-cs one of said contacts the mere. there for and the movablecontact controlled by the operator.

Similar numbers end .lll'Jl/filb oi loser-slice indicate like parts.

llpcn the table A is placed e. devices for holding and .1. L L} L in r 11119, Contact me UQCllQS to be unn said devices -ere here shown 3 o i ifhe i l as m J, k/ EN) Li (L6 mu LflCrl bl lbw lding ste ion and an operaindicate in a ll? -1 contact with body A he acting on the treadle 5normally liOl-ClS arm.

i in raised position ,l ournrrled at its e1 25 in cirets on table Ii ishorizontal slllsiil E provided with sleeve of ir ulzrting 'eriz il. Onthis sleeve seounml es tactplzrtes G, Y re are Welding ions. These 'Mcedin proximity L0 the o and are disposed on the s successive Offlfilcircvn f e telly, to se'yfassuniing there are 0; plates G 51, l, as hereshown they are ecti'wely disposed in the three different 120 sectorswhich together make u the entire circumcontact piste N.

1 4 0 sale;

lever carries an arc-she) to brac ets 8 standard 5 normally hold thelevers if, L. M in raised position, but vvlie, ei' l er of said leversK, L or M is moved 4 vnwerd, contact plate ll c0- flies 'Wtli one of thecontact pistes G, l sleeve F och contact plate G, H, r or in n C, Fig. 3integral with which extends through sleeve F and electrical connectionwith shaft Er lief: E is rotated power applied to pulley 12.

e eiectr eel. connections are as follows.

with plate ll; also that but one 1 Lite ii at a time can be moved intocooper ive posi- '1 with associated contact G lrl, nee shaft nrot-lites, the plates (l H, I come into successive cooperation with theplates N on the band levers K L M, and the Welding current accordinglyis delivered to the devices R, G, D in succession: so that the bodies indevice B are first Welded then the bodies in device C and then thebodies in device D, then the bodies in device B again and so on Asalready stated, the number of Welding de l es Bflj, D may be as de '7 idbut "prei erebly it should be such that is afforded for the operator atgiv n device, as to adjust liis pair of bodies to be welded in theirholders and move aid bodies into contact during tire period that theother devices, as (1 are 2 deliver current at his Welding station, his

pair of bodies tliere located Will be ready to receive it. in this Way,the Work goes on continuonsl y with the greetest economy of time.

upon the measured itially around the sleeve F. if t equal, then at everywelding duration of the current will be they be made unequal, the noperiod oi the welding current may be r or less a t any given station.ll'niic it is possible for each operator in turn to move down his handlever when his contact plate, say (i, comes into proper position tocooperate with plate N on said lever, in practice this is difficult todo accurately, and therefore I prefer to construct the device so thatthe operator cannot him- I move his plate N into direct contact h plateG, but can only bring his plate hi into contact with the portion of theshaft E not covered by said plate G: so that the actual contact isestablished by the rotation of the shaft causing plate G to run underplate N. To this end I provide over every plate (l, H, I a guard P ofinsulating ma terial. having a flange Q by which it is secured to sleeveF. Obviously, this guard which completely shields its associated plate(2, .ll or 1, prevents the operator from moving his plate N directlyinto contact with its cooperating plate on sleeve F. But as the shaft Erotates with the plate N held against its periphery, said guard runsover said plate 1? which then makes contact with plate (i, H or Ibeneath guard 'P and while in the space between said guard and saidplate.

I claim:

1. An apparatus for electric welding,co1nprising a plurality of devicesfor contacting the members of a plurality of pairs of bodies to bewelded, a source of welding current, means for switching the wholecurrent from said source into each of said contactdevices andautomatically operating means for determining successive time periodsduring which said switching means maybe closed.

52. i-Ln apparatus for electric welding, comprising a plurality ofdevices for contacting the members of a pluralitv of pairs of bodies tobe welded, av source of welding current, means at each contactingdevicetor switching the whole current rrom said source into said contactingdevice, and air" matically operating means for detcrininp successiv timeperiods during which said switching means may be closed.

aiu'mratus for electric ling, lity of devices for convices, humor ineach branch circuit for s tellin the whole current from said source oeach said contacting devices and automatically operating means fordetermining successive time periods during which said switching meansmay be closed.

4. An apparatns lor electric welding, comprising a plurality of devicesfor contacting the members of a plurality of pairs of bodies to bewelded, a source of alternating current, a transformer, a plurality ofdevices for contacting the members cl a plurality of pairs of bodies tobe welded connected in the secondary circuit of saidtransformer, andmeans for closing said secondary circuit to each of said contactingdevices and automatically operating means for determining successivetime periods during which said circuit-closing means may be operated.

An apparatus for electric welding, comprisin at successive stations, aplurality of devices for contacting the members of a plurality of pairsof bodies to be welded, means at each station and actuated by anoperator at said station for controlling said contacting devices, meansfor closing circuit through said pairs of bodies, and automatical'lyoperating means for determining successive time periods during whichsaid circuit-closing means may be operated.

6. An apparatus for electric welding, comprising a plurality ofseparately actuated devices for contacting the members of a plurality ofpairs of bodies to be welded and operatively related to a circuit to becontrolled, means for operating said contacts, and means for securing acertain time interval between the operation of the successive contactswithout interfering with the free operation of the individual contacts.

7. An apparatus for electric welding, comprising. at successivestations, a plurality of devices for contacting the members of aplurality of pairs of bodies to be welded, and means for closing circuitthrough the members of each oli said pairs successively and for a'n'cdctcrmincd time period? (he said means For moving said members intocontact and the said circuit-closing means at each station beingindepemlcnt'ly oper able by an operator at said station.

8. An apparatus for electric welding. comprising a rotary shaft and. inparallel circuit and at successive stations, a plurality ol devices forcontacting the members of a plurality of pairs of bodies to be welded,contacts on said shaft. and contacts respectively cooperating with saidshaft contacts: the said means for moving said bodies into weldingcontact and the said means for closing circuit at said shaft contacts ateach station being independently operable by an operator at saidstation.

9. An apparatus for electric welding, co1nprising a rotary shaft and, inparallel circuit and at successive stations, a plurality of devices forcontacting the members of a contacts on said shaft, and contactsplurality of pairs of tant from said shaft contacts and cooperat ingwith said shaft contacts when by the rotation of said shaft circuit isestablished between them and said shaft contacts: the said means formoving said bodies into weldin contact and the said means for 'i'novingsai contacts into proximity to said shaft being independently operableat each station by an operator at said station.

10'. An apparatus for electric welding, comprising a rotary shaft and,in parallel circuit and at sucressive'stations, a plurality of devicesfor contacting the members of a plurality of pairs ofbodie's to bewelded, contacts on said; shaft, contacts, each movable into proximityto said shaft at a point distant from said shaft contacts andcooperating with saidshaft contacts when by the rotationof said shaftcircuit is established between them and said shaft contacts, and a guardon said shaft covering each shaft contact but separated therefrom by aclearance sufficient to permit passage beneath it of said movablecontact: the-said means for moving said contacts into proximity to saidshaft being independently operable at each station by'an operator atsald station.

copies of this patent may be obtained for 11. An apparatus for electricwelding, comprising a plurality .of devices for contactin the members ofa plurality of pairs of bo ies to be welded, a rotary shaft, contactsthereon, a plurality of pivoted levers,"

and contacts on said levers respectively cooperating with said shaftcontacts: the said shaft contacts (:06 erating with said lever contactssuccessive y to close circuit through said pairs. I

12. An apparatus for electric welding, comprising a plurality of devicesfor contacting the members of a plurality of pairs of bodies to be-welded, a rotary shaf contacts thereon, a plurality of-pivoted levers,

contacts on said leversrespectively cooper-v ating withsaid shaftcontacts, and ard plates laterally supported on sand sha and coveringsaid shaft contacts, there being a clearance between the said guardplates and said shaft contacts for the passage ofsaid lever contacts,and the said shaft contacts cooperating with'said lever contacts duringsaid passage successively to close' -cjircuit through said pairs; v f

In testimony whereof I have aifixed my signature in presence of twowitnesses.

THOMAS E. MURRAY. Witnesses:

GERTRUDE ,P. PORTER, Max T. MCGARRY.

Wellington, D. 0.

five eentl each, by addressing the Commissioner of Patents,

